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Fair Value Measurements - Fair Value Option on Consolidated VIEs (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Mortgage loans | VIE |  |
Fair Value Option, Quantitative Disclosures |  |
Fair value | $ 140.6 |
Aggregate contractual principal | 140.6 |
Other loans | VIE |  |
Fair Value Option, Quantitative Disclosures |  |
Fair value | 129.0 | $ 163.2
Aggregate contractual principal | 139.9 | 167.1
Long-term debt | VIE |  |
Fair Value Option, Quantitative Disclosures |  |
Fair value | 21.8 |
Aggregate contractual principal | 21.8 |
Other loans of consolidated VIEs |  |
Fair Value Option, Quantitative Disclosures |  |
Change in fair value pre-tax gain (loss) - instrument specific credit risk | (22.8) | (5.6)
Change in fair value pre-tax gain (loss) | (22.8) | (5.6)
Interest income | $ 31.0 | $ 8.1

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